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VA Secondary Conditions Explained

Educational guide · Updated June 2026

Many veterans are rated for one condition but never claim the other conditions it caused. Those are secondary conditions, and they can add real value to your rating. Here is how they work and what it takes to claim one.

What a secondary condition is

A secondary condition is a disability that was caused or aggravated by a condition VA has already service-connected. The key difference from a regular claim is what you have to prove. For a primary claim, you show the condition is connected to your service. For a secondary claim, you show the condition is connected to your already service-connected condition. You do not have to prove it started in service at all.

How a primary condition leads to a secondary one

Service-connected conditions often create downstream problems, either directly or through the medications used to treat them. A knee injury can change the way you walk and lead to a hip, back, or opposite-knee condition over time. Chronic pain can contribute to depression or anxiety. PTSD is frequently linked to sleep apnea. And many common medications can cause gastrointestinal problems like GERD. The connection is medical, which means it has to be documented by evidence, not assumed.

Common examples

Sleep apnea secondary to PTSD
Depression or anxiety secondary to chronic pain
Radiculopathy (nerve pain) secondary to a back condition
GERD secondary to medication for a service-connected condition
A hip or second knee condition secondary to an altered gait
Hypertension secondary to certain conditions

These are common patterns, but your own records and a medical opinion determine whether a link applies to you. The free Secondary Conditions Mapper lets you pick a service-connected condition and see commonly linked secondaries to discuss with a provider.

Common secondary condition pairings, explained

A few pairings come up again and again, because the medical connection is well recognized. Understanding them helps you spot conditions you may not have thought to claim:

Sleep apnea secondary to PTSD. Disrupted sleep, hyperarousal, and weight changes tied to PTSD can contribute to or worsen sleep apnea. It is one of the most common secondary claims. See sleep apnea secondary to PTSD.
GERD secondary to PTSD or medication. Chronic stress and the medications used to treat a service-connected condition can contribute to acid reflux. See GERD secondary to PTSD or medication.
IBS secondary to PTSD. The gut-brain axis links chronic stress to digestive function, making irritable bowel syndrome a common secondary claim. See VA rating for IBS.
Depression or anxiety secondary to chronic pain. Living with a painful service-connected condition can lead to a diagnosable mental health condition. See VA rating for depression and anxiety.
Radiculopathy secondary to a back condition. A service-connected spine condition can cause nerve pain down the leg, which is rated separately. See VA rating for sciatica.
A hip, knee, or opposite-side joint condition from an altered gait. Favoring an injured joint over time can wear down others.

Whether any of these apply to you depends on your records and a medical opinion. Explore likely links for your specific conditions with the free Secondary Conditions Mapper.

Why medical evidence matters

A secondary claim rises or falls on the link. VA needs two things: a current diagnosis of the secondary condition, and a medical opinion connecting it to your service-connected primary condition. That opinion can be based on a causation theory (the primary caused the secondary) or an aggravation theory (the primary made an existing condition worse). A nexus letter that explains the medical reasoning, the "because," is usually the most important evidence you can submit. The Nexus Letter Template gives your doctor the language VA looks for.

How secondary conditions affect your rating

Each granted condition is added to your combined rating using VA's combined ratings table, not simple addition. Because of how that table works, even a moderate secondary condition can move your combined rating up a bracket and increase your monthly compensation, especially when it pushes you across a rounding threshold. You can see how conditions combine with the VA Disability Rating Calculator.

Common mistakes and misunderstandings

Never claiming secondaries at all. This is the biggest one. Veterans often leave related conditions unclaimed for years.
Assuming the link is obvious to VA. It is not. You need a diagnosis and a medical opinion that spells out the connection.
Trying to prove it started in service. For a secondary claim you only need to link it to the primary condition.
Forgetting aggravation. A condition that existed before but was made worse by a service-connected condition can still be claimed.

Organize your secondary claim information

Explore likely links with the Secondary Conditions Mapper, give your doctor a Nexus Letter Template, and organize records with the Condition Evidence Builder. More in the Secondary Conditions hub.

Organize it in one place: Premium members use the Secondary Conditions Blueprint to organize possible secondaries, the educational rating impact, and the questions to discuss with a provider or accredited representative, then export a preparation packet. Educational preparation only.

Frequently asked questions

What is a VA secondary condition?
A secondary condition is a new condition caused or aggravated by a condition VA has already service-connected. You show it is linked to your existing rated condition rather than proving it started in service.

What evidence does a secondary claim need?
A current diagnosis of the secondary condition and a medical nexus linking it to your service-connected primary condition, on a causation or aggravation theory. A nexus letter is often the key piece.

Does a secondary condition increase my rating?
It can. Each granted condition is added to your combined rating using VA's combined ratings table, which can raise your overall rating and monthly compensation.

VetClaimsGuide is a free, veteran built educational resource. It is not a law firm, not VA-accredited representation, and does not file claims, diagnose conditions, or guarantee any outcome. Confirm everything at VA.gov or with an accredited representative.